Laminated packing material with spaced parallel reinforcing members

ABSTRACT

A laminated packing material consisting essentially of two outer, layer-like members and an intermediate array of spaced, parallel, stiffening rib members secured to said outer members. At least one of said outer members may comprise two layers of paper with an intermediate layer of fabric. The rib members may be in the form of relatively short, flat, strips of wood fiber board whose abutting ends are staggered from rib to rib.

United States Patent Silfverlin [15] 3,668,049 [451 June 6,1972

LAMINATED PACKING MATERIAL WITH SPACED PARALLEL REINFORCING MEMBERS AdeWilliam Silfverlin, Sandviken, Sweden Sandvikens Jernverks Aktiebolag,Sandvikens, Sweden Inventor:

Asslgnee:

Filed: June 17, 1971 Appl. No.: 154,198

Related U. S..Applica tion om Continuation of Ser. No. 783,478, Dec. 13,1968, abandoned.

Foreign Application Priority Data Dec. 19, 1967 Sweden ..17384/67 US. Cl..161/38, 156/296, 156/304,

161/39, 161/60, 161/143, 217/17, 229/87 Int. Cl .l ..B32b 3/10 Field ofSearch ..161/38-39, 60,

[56] References Cited UNITED STATES PATENTS 2,680,319 6/1954 Dratler..161/39 X 1,474,699 11/1923 Wisbrock.. ....l6l/143 X 516,572 3/1894Mowry ..161/143 886,926 5/1908 Bishopric... ..161/39 2,217,773 10/1940Selva .Q ..217/17 UX Primary Examiner-Philip Dier Attorney-Pierce,Scheffler & Parker [57] ABSTRACT A laminated packing material consistingessentially of two outer, layer-like members and an intermediate arrayof spaced, parallel, stiffening rib members secured to said outermembers. At least one of said outer members may comprise two layers ofpaper with an intermediate layer of fabric. The rib members may be inthe form of relatively short, flat, strips of wood fiber board whoseabutting ends are staggered from rib to rib.

6 Claims, 3 Drawing figures PATENTEDJHNV :912 3,668,049

SHEET 10F 2 v 1 LAMINATEDPACKING MATERIAL WITH SPACED PARALLELREINFORCING MEMBERS I This application is a continuation of applicationSer. No.

783,478, filed Dec. 13, 1968, now abandoned.

The present invention relates to a laminated packing material especiallysuitable for packing long objects such, for example, as tubes, rods and.the like. It is characterized by being very easy tofonn, at the sametime as it has a sufficient stiffness for protecting a fragile packedobject.

' Hitherto there have been used for this purpose wood boxes, which,however, are expensive and have a relatively great weight. I

The material according to the invention consists of two layers of paperand/or cloth or similar sheeted material and an intermediate layer ofribs made of .some stiff material such as wood fiber board.- The ribsare parallel and somewhat spaced from each other, and are secured to thesurrounding layers by means of a'suitable adhesive, for instance withglue. This compound structure can be bent in a direction perpendicularto the ribs but maintainsits stiffness in the direction along the ribs.

The invention is illustrated more closely in the following specificationtaken in connection with the figures of the appended drawing, in which:

FIG. I is a perspective view of an example of how the packing materialaccording to the invention can be manufactured;

FIG. 2 is a detailed perspective view of an embodiment of an embodimentof the packing material according to the invention; and

FIG. 3 illustratesan example of how packing material according to theinvention can be used.

In FIG. 1 the outer layers are provided from supply rolls 1 and 7. Ontheir adjacent sides they are provided with glue from containers 2 and4. The ribs are supplied from a magazine 3, and means for holding anddistributing the ribs are schematically indicated at 5. As can be seenat 6, the ribs are distributed in such a way that adjacent rows of ribshave their abutting ends at different longitudinal places. This isimportant in order to obtain stiffness of the packing material in thelongitudinal direction. Pressure rolls 8a and 8b serve to press theouter layers and the ribs together. A cross-wise movable saw, indicatedat 9, serves to cut off suitable lengths of the'laminated material.

FIG. 2 shows an example of a package material according to theinvention. It has two outer layers A and B with an intermediate layer ofwood fibers. Layer A is composed of two layers of strong crepe paper 10,each with a layer of asphalt on the adjacent sides. Between these layersl0, 10 there is a net of nylon 11. The weight of the layer A is 290 g/m.The other layer B consists of a layer of strong crepe paper 12 with alayer of asphalt and a layer of jute fabric on the outside. Layer 8weighs 350 g/m. The paper and the fabric are treated with a substancethat reduces the corrosion influence from the atmosphere, -e.g., lithiumnitride ora similar inhibitor. The ribs 14 are formed from a mediumhard, water-resistant, wood fiber board having a thickness of 7 mm'and'awidth of 25 mm. The spacing between the ribs is 5 mm.

FIG. 3 shows an example of a package made of the present material. Thewrapping has been bent to a hexagonal shape and tied by strips. The endopenings can, if desired, be covered with end plates, around which thewrapping is folded.

The invention is not limited to the described materials. For the outercontinuous, flexible layers there can be used any material that has thesuitable properties, i.e., paper, cloth, plastics and known equivalents.Forforming the ribs wood fiber board is very convenient, but also woodor plastics can beused. Y

d An important advantage of the present packaging material is that itcan be manufactured in arbitrary lengths, the different longitudinalposition of .the joints between the ribs 6 in adjacent rows providingthe necessary stiffness of any length of the material. The material willthus provide a continuous wrapping for objects having a length up to 25meters.

I claim: l. A laminated packing material comprising two layers of acontinuous flexible material in face to face relationship having anintermediate layer attached to opposed faces of said flexible layers,wherein said intermediate layer comprises a plurality of elongated ribsin substantially parallel spaced relationship, each of said elongatedribs consisting of a row of consecutive shorter ribs, the joints betweensaid shorter ribs in adjacent rows being situated in different positionsin the direction along the ribs, the arrangement rendering the materialstiff in arbirtary lengths along the ribs and flexible in the crosswisedirection.

2. Laminated packing material as defined in claim I, in which theribsare bonded to the two outer layers with an adhesive.

3. Laminatedpacking material as defined in claim I, in

- which the outer layers comprise paper.

4. Laminated packing material as defined in claim 1, in which the outerlayers comprise woven fabric.

5. Laminated packing material as defined in claim I, in which the ribsare made of wood fiber board.

6. Laminated packing material as defined in claim 4, in which the fabricconsists of a nylon net.

* I k i

2. Laminated packing material as defined in claim 1, in which the ribsare bonded to the two outer layers with an adhesive.
 3. Laminatedpacking material as defined in claim 1, in which the outer layerscomprise paper.
 4. Laminated packing material as defined in claim 1, inwhich the outer layers comprise woven fabric.
 5. Laminated packingmaterial as defined in claim 1, in which the ribs are made of wood fiberboard.
 6. Laminated packing material as defined in claim 4, in which thefabric consists of a nylon net.